0361TQ Welding Cable0361TQ - Flexible Welding Cable

Specially flexible tinned annealed copper or aluminium conductor (0361TQ / AL), Ethylene Propylene (EP) Rubber Insulated / Chlorosulphonated Polyethylene (CSP) sheathed - BS638.

HOFR : heat and oil resistant, flame retardant

Colour : orange, yellow or black

Operating temperature : maximum 85oC, Minimum flexing -20oC

Minimum bending radius : 6 x overall diameter

For current ratings see below.

Duty cycle : the duty cycle is defined as the time for which the current flows expressed as a percentage of the complete cycle, which is taken as 5 minutes.  Since the length of time for which current flows during welding operation varies from occasionally to continuous, the duty cycle can vary from as little as 20% to a maximum of 100% on automatic operation.  As conductor temperature varies according to time in use as well as current, the following ratings are given as a guide:

  • Automatic welding : up to 100%
  • Semi-automatic welding : 30 - 85%
  • Manual welding : 30 - 60%
  • Very intermittent or occasional welding : Up to 20%

Ambient temperatures : cable operating temperature also varies according to the prevailing ambient temperature.  EPR / CSP cables are designed to give optimum performance up to an operating temperature of 85oC at an ambient temperature of 25oC.  The reduction factors for increased ambient temperatures are:
 

Ambient Temperature 30oC 35oC 40oC 45oC
Reduction Factor 0.96 0.91 0.87 0.82

Operations under severe conditions : High operating temperatures or prolonged maximum loading of the cable reduce the service life or makes the cable too hot to handle.  Thus under conditions where a long service life cannot be expected or where a high surface temperature is tolerable, the current rating for 25oC may be applied up to an ambient temperature of 40oC.

Size Sq. MM Stranding MM Diameter over Conductor MM RT of insulation MM Diameter over core MM RT of Sheath MM Nominal overall diameter MM 0361TQ weight copper conductor KG / KM 0361TQ / AL weight aluminium conductor KG / KM
16 Class 6 - 5.7 0.9 7.5 1.7 10.9 212 -
25 Class 6 154 / 0.45 7.1 0.9 8.9 1.8 12.5 300 146
35 Class 6 217 / 0.45 8.5 0.9 10.3 1.8 14.0 403 189
50 Class 6 312 / 0.45 10.3 0.9 12.1 1.9 16.0 560 250
70 Class 6 437 / 0.45 12.4 1.0 14.5 2.0 18.6 776 349
95 Class 6 589 / 0.45 14.5 1.0 16.6 2.2 21.2 1035 455
120 Class 6 756 / 0.45 16.0 1.0 18.1 2.4 23.1 1300 564
150 Class 6 925 / 0.45 18.0 1.1 20.3 2.5 25.5 - 683
185 Class 6 - 20.0 1.2 22.5 2.6 27.9 1944 -
240 -  1525 / 0.45 23.0 1.3 25.7 2.8 31.5 - 1064

Current Ratings

Typical guidance values for different welding processes are as follows:

  • Fully automatic welding 100%
  • Semi-automatic welding 65 - 85%
  • Manual Welding 30 - 60%
  • Very infrequent or occasional welding 20%

Cross Sectional Area

Loading Current in Amps for the Following Duty Cycles
mm² 100% 85% 60% 30%
16 135 145 175 245
25 180 195 230 330
35 225 245 290 410
50 285 310 370 520
70 355 385 460 650
95 430 470 560 790
120 500 540 650 910
185 660 715 850 1200

Correction Factors

Cable operating temperature also varies according to the prevailing ambient temperature. These cables are designed to give optimum performance up to an operating temperature of 85°C at an ambient temperature of 25°C. The reduction factors for increased ambient temperature are:
 

Ambient Temperature 30°C 35°C 40°C 45°C 50°C 55°C
Correction Factor 0.96 0.91 0.87 0.82 0.76 0.79

Conductor Resistance (ohms per kilometre) and Voltage Drop

Nominal Cross Sectional Area Max. Resistance at 20°C Tinned Voltage Drop (For Guidance Only)
Volts Per 100 Amp Per 10 Metres
DC Current *
20°C 60°C 85°C
mm² ohms/Km V V V
16 1.240 1.240 1.430 1.560
25 0.795 0.795 0.920 0.998
35 0.565 0.565 0.654 0.709
50 0.393 0.393 0.455 0.493
70 0.277 0.277 0.321 0.348
95 0.210 0.210 0.246 0.264
120 0.164 0.164 0.190 0.206
185 0.108 0.108 0.125 0.136

*Note:
The values for AC Current may be much higher, depending on the configuration of the cables.